Berserker doesn't have a way to enrage the boss and they do mediocre tank dps, it automatically loses most viability in any decent group and it will likely piss off anyone you group with in LFG.

Lancer or Brawler are much better options with Lancer being the best because it provides the best group buffs of any tank, Brawler being slightly worse in that regard but they do much more DPS to make up for their party members doing less.

Warriors also have a place for tanking with their apex changes and they sit in the middle of the two being better dps than Lancer but less buffs/more buffs than Brawler but less DPS (debatable). Warriors are also the most difficult tank in terms of learning boss mechanics and dealing damage while not also taking too much damage.